A cobpobatioh ob hew yosk



A. 0. DADY. EXHAUST VALVE AND MEANS FOR-COOLING THE SAME.

Patented June 1o, 1919.

ARTHUR, o. DnDY, or NEW YORK,

N. Y., ASSIGNOR TO PFAN'STIEHL COMPANY, INCOR- PORATED, OF N ORTH CHICAGO, ILLINOIS, A. CORPORATION 0F NEW YORK.

EXHAUST-VALVE AND MEANS FOR COOLING THE SAME.

zum

Specication of Letters Patent.

Patenten June io, raie.

Application led January 2, 1918. Serial No. 203,893.

To all whom t may concern.' Y

Be it known that I, ARTHUR O. DADY, a citizen of the United States, residing at New York, in the c unty of New York and State of New York, have invented a certain new and useful Improvement in Exhaust-Valves and Means for Cooling the Same, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, lforming-a part of this specification.

This invention relates to improvements in valves, and is especially concerned with hollow exhaust valves of the type in which fluid is supplied to the interior of the valve for cooling the same.

The objects of the invention are: first, to provide novel means for supplying the valve lwith cooling uid; second, to provide means whereby the water used for cooling the cylinders of an internal combustion engine can also be employed for cooling the exhaust valves; and, third, to provide novel means in connection with a liquid cooled valve for radiating the heat transferred from the valve walls t the liquid. l

Furt er objects will appear as the description progresses, reference being had to the accompanying drawings in which,

Figure 1 is a vertical section on the line 1-1 of Fig. 2 showing portions of a cylinder provided wit i my improved valve and cooling means; and

Fig. 2 is a -side elevation thereof disclosing the means for securing a radiator toand in communication with the water jacket.P

Referring to the drawing, the reference character 1 indicates the wall of a cylinder having a bore 2 and a water jacket 3. The cylinder is provided with an exhaust port having a valve seat 5 formed therein. A

`hollow headed exhaust valve 6 co-acts with the seat 5 to open and close the exhaust port and slides in a sleeve bearing 7 which is suitably supported in a cored boss 8 formed in the water jacket. The upper end of the hollow valve stem 9 is open and slides in a gasket 10 which has screvvthreaded engagement with the walls of a packing chamber 11 which opens into the enlarged radiator 12. Packing 13 of asbestos or other suitable material fills the space between` the valve stem and the walls of the chamber 11. The lower wall of the radiator 12 is provided with an opening 14 which communicatesthrough -thevalve I have with an opening 15 in the upper end of the water jacket through the pipe 16. As means for holding the radiator 12 and the pipe 16 in assembled relation with the water jacket I provide the radiator with a pair of 0ppositely disposed lugs 17 having bores therehfor receiving the clamping bolts 18, the lower screwthreaded ends of which are received in the screwthreaded bosses 19 at the upper end of the cylinder.

ile any desiredmeans may be employed for actuating the valve 6 I have illustrated certain means for accomplishing this result, but it is to be understood that they form no part of my present invention. In the drawings the stem of the valve is shown as provided with a collar 20 which is screwthreaded in any desired manner and is providedv with a ange 21 which acts as an abutment for the upper end of the compression spring 22, the lower end of this spring resting upon the water jacket for the head of the cylinder. This valve spring tends to hold the valve in its closed position. In order to open illustrated a valve lever 23 which is pivotally mounted upon the shaft 24, one end of said valve lever resting upon the upper end of the collar 20 and the other end being rovided with an anti-friction roller 25 which is engaged by the cam 26 upon the cam shaft 27 to open the valve `at the proper instant.

In operation water liow's from the water jacket through the pipe 161 into the radiator 12 and then into the hollow stem 9 and the head 6 of the valve. As the water in the head f the valve becomes heated it is displaced) by colder water and rises through the hollow stem 9 and Hows into the radiator 12. The heated water is cooled by radiation of the heat from the enlarged radiator 12 and will in turn displace the heated water from the valve head 6.

While I have disclosed and described in detail the preferred embodiment of my invention it is to be understood that my invention is not limited to the details described, but is capable of other adaptations and modifications within the scope of the following claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. The combination with a cylinder having a water jacket provided with an openico ing and' a. port provided with a valve seat, of a valve eo-aoting with said seat comprising a hollow head and a hollow stem communicating therewith, a hollow radiator surrounding the open end of said stem and cornmunioating therewith, the said radiator being provided with an opening in one Vside and a lug, a pipe connecting the openings in said water jacket and said radiator, and a bolt extending through said lug and into said water jacket for clamping .and pipe thereto.

2. The combination with a cylinder having a water jacket provided with an opening, and a port provided with a Valve seat, of a valve eo-acting with said seat, comprissaid radiatorA moar/1 ing a hollow head and a hollow stem communicating therewith, a hollow radiator surrounding the open end of said stem and communicating therewith, the said radiator being provided with anopening in one side, a pipe connecting the opening in said Water jacket and said radiator, and means for clamping said radiator and pipe to said water jacket.

lnA witness whereof, l hereunto subscribe my name this 21st day of December, A. D.

ARTHUR 0. DADY. Witnesses:

J. E. LOWE,

V. A. Dam'. 

